In article ,
John Rumm wrote:
(although for this application I think I would just use a neon between
switched live and earth - or across the switch if you want the neon lit
when the switch is off)

There are also mains LED indicators available for those who don't like
neons and can't be bothered with resistors and diodes.

--
*If you must choose between two evils, pick the one you've never tried before

Dave Plowman London SW 12
RIP Acorn